Pipe-door



J. DICK.

PIPE DOOR. APPLICATION FILED JULY 5.]916.

1,327,377, Patented Jan. 6,1920.

. sary or COMPANY, OF CANTDN, OHIO, A CORPORATION OF OHIO.

PIPE-DOOR.

menses.

Specification of Letters Patent.

Patented J" an. 6, 1920.

Application filed July 5, 1916. Serial No. 107,525. 7

To all whom it may concern:

Be it known thatl, Josurr-r DICK, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Pipe-Doors, of which the following is a specification.

The invention relates to a door for pipes, such as the discharge pipe leading upwar from the blower of a fodder cutter or the like, in which it frequently becomes necesdesirable-to gain access to the interior of the pipe for the purpose of removing or dislodging material'whichhas become caught in and has clogged the mouth of the pipe; and the objects of the invention are to provide in such a pipe, a removable door in which the upper edges of the opening in the pipe will be lapped by theupper end of the door plate, hinging connections between the cover or door plate; so that no protruding edges or parts will be presented on the interior of the pipe which tend to catch material and thus prevent its free and unobstructed passage upward through the pipe; and which is very simple in construction and inexpensive.

The object of the invention may be attained by providing at the desired place in the pipe an opening, and a door-plate therefore slightly larger than the opening, the plate being cut away at each side to permit the upper portion to be inserted within the opening and to lap the upper inside edges thereof, and there being transversely alined inter tting bearing notches in each side of the opening and plate upon which the plate is adapted tobe rotated, and a turn button pivoted to the pipe immediately below the opening serving to lock the plate in position with the lower portion of the plate lapping the lower edges of the opening on the outer side of the pipe.

The invention thus set forth in general terms is illustrated in the accompanying drawings forming part hereof, in which-'- Figure 1 is a front elevation of a fragmentary section of pipe, showing the door applied thereto;

Fig. 2, a side elevation of the same partly in section;

Fig. 3, a transverse section on line 3-8, Fig. 1;

Fig.

4, a perspective view of the door plate;

and to dispense with all;

within the opening in the pipe,

lapped edges 1? and 1 Fig.5, a front elevation of a pipe section showing a modified form of door; and

Fig. 6, a fragmentary side elevation of a portion of the pipe showing the opening without the door plate.

Similar numerals refer to similar parts throughout the drawings.

The door consists of a plate 1 adapted to close an opening 2 which is providedin a pipe 3 formed of sheet metal in any'well known manner. I

The opening 2 in the pipe, as shown in Figs. 1 and 2, is in the form of a quadrilateral figure and is so disposed that its diagonals extend longitudinally and transversely of the pipe; the upper side edges as well as the lower side edges of the figure being equal and the plate 1 is formed from a similarly shaped piece of metal slightly larger than the opening 2 and bent on one of its diagonals to conform to the shape of the pipe. 1

In order that the upper edges 2 of the opening will not form a projection on the inner surface of the pipe which will tend to catch the severed material and thus obstruct its free passage upwardly through the pipe, the upper portion of the plate is adapted to be inserted within the pipe with its upper side edges 1 lapping the insideedges 2 of the opening, the lower portion of the plate remaining on the outside of the pipe with its lower side edges 1 lapping the lower outside edges 2 of the opening.

For the purpose of thus permitting the insertion of the upper portion'of the plate the plate is cut away or notched at each side from its transverse diagonal upwardly. forming the vertical side edges leans shoulders 1 The width of the plate between its vertical side I edges 1 is slightly less than the length of the transverse diagonal of the opening, so that the plate maybe inserted throughthe opening until stopped by the shoulders 1 engaging with the sides of the pipe 2, which shoulders together with the side edges 1 form axial bearing notches l, adapted to engage with the bearing notches 5 in the pipe formed by the side cornersof the opening 2.

' In order to permit the upper and lower of the plate to lie flat against the upper inside edges 2* and the lower outside edges 2" respectively, of the opening, the upper and lower side edges of p %TAT% Parana curios.

nreK MANUFACT RING the opening are separated or distorted laterally as at 6 at each of the notches in the Ward; and the vertical side edges LL of the understood that the cover plate may also be bent slightly inward immediately above the shoulder 1 In placing the door plate in position to close the opening its upper portion is first inserted transversely through the opening until the bearing notches thereof engage with the bearing notches 5 in the pipe, as shown in Fig. 2, whereupon the plate may be freely rotated on its transverse axis; and

bv reason of the distortion of the upper andlower side edges of the opening at the notches 5 the upper and lower edges of the plate may be easily closed flat against the edges of the openings 2.

For the purpose of locking the plate in closedposition, a turn button 7 is pivotally mounted on the pipe 3 immediately below the opening 2, which button when rotated to engage the lower end of the plate, serves to hold it from rotation on its bearin s and to prevent it from slipping downward out of position; and if desired, the lower end of the plate may be cut away as at 8, in order to provide a larger bearing surface for the turn button.

In Fig. 5, I have illustrated a modified form 'ofdoor, the door plate 1 and opening .2 being circular in for so that it will be particular shape of the door which has been described is not essentian to the invention. When this fo m of door is employed, the lateral. incisions 6 'fori'u bearing shoulders for the shoulders 1 in the sides of the plate, but it will be evint that when the door is in the form of a quadrilateral figure, the shoulders formed by the notches 5 at the angles of the upper and lower side edges of the opening will make the use of the lateral incisions, for this purpose unnecessary, in

' which case the distortions are provided for convenience in order to more readily permit the lapping edges of the plate to lie flat against the pipe. I

I claim:

I. A pipe having an opening therein, and a door. plate slightly larger than the opening cut away at each side to permit its upper portion to be inserted in the opening to underlap the upper portion thereof, there being inter-engaging shoulders at each side of the opening and the plate, and means for holding the shoulders in engagement.

' 2. A pipe having an opening therein, with a bearing notch at each side, a door plate slightly larger than the opening cut away at each side to form shoulders for engaging the notches and to permit its upper edge to be inserted in the opening to underlap the upper edge thereof, and means for holding the shoulders in engagement With the notches.

3. A pipe having an opening thereimwith a bearing notch at each side, a 'door plate slightly larger than the opening cut away at each side to form shoulders for engaging the notches and to permit its upper edge to be inserted in the opening to underlap the upper edge thereof, the notches being slightly distorted to permit the edges of the plate to'lie flat against the edges of the opening, and

means for holding the shoulders in engagement with the notches.

4. A pipe having an opening therein, and a door'plate slightly larger than the opening cut away at each side to permit its upper portion to be inserted in the opening to underlap the upper edge thereof, there being interengaging fulcrum notches at each side of the opening and the plate for positionin the plate with its edges lapping the edges 0' the opening, and means for holding the notches in engagement.

A. pipe having an opening therein, ant

a door plate slightly larger than the opening cut away at each side to permit its upper portion to be inserted in the opening to underlap the upper edge thereof, there being interengaging fulcrum notches at each side of the opening and the plate for positioning the plate with its edges lapping the edges of the opening, and means for locking the plate in closed position.

6. A pipe having an opening therein, and

v a door plate slightly larger than the opening cut away at each side to permit its upper portion to be inserted in the opening to underlap the upper edge thereof, there being 'h' erengaging fulcrum notches at each side the opening and the plate for positioning the plate with its edges lapping the edges of the opening, and a turn button for abutting the lower edge of the plate having a flange for overlapping said edge to lock the plate in closed position.

JOSEPH DICK. 

